Problem
Possible causes/consequences and M Solutions
The fuse is blown.
X
Replace the fuse; see the "Fuse allocation" supplement.
X
Have the cause of the blown fuse determined at a qualified spe-
cialist workshop.
or
A malfunction has occurred.
X
Switch the ignition on and off twice.
If the auxiliary heating still cannot be switched on, the heating device
is faulty.
X
Have the auxiliary heating checked at a qualified specialist work-
shop.
The auxiliary heating is
overheated.
The coolant level is too low.
X
Check the coolant level and add more coolant if necessary
(
Y page 222).
Auxiliary warm-air heater
Operation with the timer
Important safety notes
G
DANGER
If a switch-on time has been selected, the
auxiliary heating switches on automatically.
R
If the ventilation is insufficient, poisonous
exhaust gases can collect, in particular car-
bon monoxide. This is the case in enclosed
spaces, for example. There is a risk of fatal
injuries.
R
If highly flammable substances or flamma-
ble materials are nearby, there is a risk of a
risk of fire and explosion.
Always deactivate the preselected switch-on
times if you stop the vehicle in such or similar
situations.
Use the timer to:
R
activate and deactivate immediate heating
mode
R
set up to three switch-on times
R
set the operating duration to between 10 and
120 minutes or to continuous operation
R
set the heating level (preselected tempera-
ture) to a range between 10 and 30
Timer overview
Timer above the overhead control panel
:
Program column
G Sets preselection memory 1 – 3
(
Y page 115)
Sets weekday (Mon. – Sun.) (
Y page 115)
;
Menu bar
y Switches immediate heating mode
on/off (
Y page 115)
B Sets the program times
(
Y page 115)
Ñ Sets the day, time and the operating
duration (
Y page 115)
ß Sets the heating level (
Y page 116)
=
Display panel for: time, heating level and
operating duration
à Continuous operation mode active
ß Heating level set
114
Operating the auxiliary heating system
Climate control
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